i don't have permission to access oracle database so i have to work on predesigned tables, in one of my field i have to auto increament that field and i can't create sequence in oracle database so is there is any way to do that through servlet . i mean using queries.
I would go an talk to your DBA (or whoever designed the tables) they MUST have created a sequence for this index field, or had a plan how you were going to use it.
If they didn't explain to them why they need to create one for it.
Just because you don't have permissin to do something, doesn't mean you can't get it done.